The area of a rectangle is x - 16. If the

width of rectangle is * + 1, find an

expression to represent the length.

there is likely a number missing in what you said the width was equal, so you may need to plug in a number in the work I provide, if so.

A=x-16

W=x+1 (assuming it just wants any number to be able to be added to the 1)

We first need to use the area formula to setup the problem

A=W*L

area equals width times length

We can divide both sides by W to solve for L and get

A/W=L

from here we can just plug in the given values for area and the width

(x-16) / (x+1) = L

This should answer your question, but the x in the denominator may need replaced if the * in your given width is actually a different value besides x.